Have you tried using a blender or immersion mixer and blend fruits & veggies into smoothies? They will unconstipate you, help things move through you easily and allow you to better regulate your output.
Things change over the years...it takes your body time...I tend to think in periods of 3 months when I am charting progress.
3 months post op I expect catastrophe...meaning I did not know what to expect and it changed daily.
After the 1st 3 months I started charting...foods that agreed with me and my pouch, foods that were 'off the list forever' and foods that I was willing to try again a few months later.
Every few months I would introduce something new and write down what, how much and how it interacted with us (me & my pouch).
As time went by I learned it was not just what I ate but what I ate it with...meaning the liquids as well as the solids that I ate along with it.
There were also questions of time of the day (my body hates solids in the mornings...my pouch likes to be completely emptied out before I start filling it again so I stick to hot and cold liquids til noon...But, that is me and my pouch...not everyone else.
I eat 2 meals/day...noon and evening...mostly protein meals with a blended or overcooked veggie....I only drink water, tea or coffee (no milk products) and rarely a carbonated beverage (usually water). I avoid drinking sugars, never drink juice with my meals and stick to fruits pre-meal...I snack on yogurts in the afternoon of chunks of cheese.
But I have learned all of this over many years...you are just at the beginning of the learning curve.
Whenever you introduce a new food do it alone or on an empty stomach...wait to see how it goes through you before you eat anymore...then chart it.
I am sure that you can find an app for this...
Then start mixing it with other foods to see what it likes or doesn't like...you will learn very quickly.
Do not expect things to be stable for at least a year (although some lucky pouchers were regulated within their first month)